Just saying that no one has to worry about a Chabad veto over moshiach (if there ever was such a thing.)
It’s much easier for any Chabad person to accept someone else endorsed by Rabbanim/ gedolim worldwide (The logical thing to do) than to stubbornly insist the Rebbe must be moshiach (which is Emuna based more than logic based.) Whoever builds the Beis HaMikdash will be accepted by everyone (duh I should hope)